The relic cosmological abundance of stable or long-lived, charge neutral, colored particles gets reduced by up to 4 orders of magnitude by annihilations that occur after QCD confinement. We compute the abundance and the cosmological bounds on relic gluinos. The same postconfinement effect strongly enhances coannihilations with a lighter dark matter particle, provided that their mass difference is below a few giga-electron volts. Charged colored particles (such as stops) can instead form baryons, which can be (quasi)stable in some models.

Cosmological abundance of colored relics

GROSS, CHRISTIAN;Strumia, Alessandro
2019-01-01

Abstract

The relic cosmological abundance of stable or long-lived, charge neutral, colored particles gets reduced by up to 4 orders of magnitude by annihilations that occur after QCD confinement. We compute the abundance and the cosmological bounds on relic gluinos. The same postconfinement effect strongly enhances coannihilations with a lighter dark matter particle, provided that their mass difference is below a few giga-electron volts. Charged colored particles (such as stops) can instead form baryons, which can be (quasi)stable in some models.
2019
Gross, Christian; Mitridate, Andrea; Redi, Michele; Smirnov, Juri; Strumia, Alessandro
File in questo prodotto:
File Dimensione Formato  
179 ColoredRelics.pdf

accesso aperto

Tipologia: Versione finale editoriale
Licenza: Creative commons
Dimensione 1.12 MB
Formato Adobe PDF
1.12 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/973245
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 22
social impact